Single-trigger gun-lock.



No. 799,852. PATENTED SEPT. 19, 1905.

A. D. HOULDGROFT. SINGLE TRIGGER GUN LOCK.

APPLICATION TILED APR. 5,1905.

NITET STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Sept. 19, 1905,

Application filed April 5, 1905- Serial No. 254,025.

To ctZZ whom it may concern.-

Be it known that I, ALBERTD. HOULDOROFT, a citizen of the United States of America, and a resident of Warren, in the county of VVorcester and State of Massachusetts, have invented certain new and useful Improvements in Single-Trigger Gun-Locks,of which the following is a full, clear, and exact description.

This invention relates to improvements in single-trigger gunlocksthat is, those in which there is combined with only one trigger shiftable devices for engaging either one of two sears corresponding to the pair of hammers of the gun-lock.-

The invention relates to specific devices and constructions comprised in a gun-lock of the class indicated, to the end of minimizing the number of components, simplifying the character thereof, and generally contributing to the eficiency and desirability of the lock mechanism.

The invention consists in the particular combination and arrangement of parts and the particular construction of certain of the parts, all substantially as hereinafter fully described, and set forth in the claims.

In the accompanying drawings, Figure 1 is a side view of the improved single-trigger mechanism. Fig. 1 is a front view of the same. Figs. 2 and 3 are plan views showing the different positions for the engagement, respectively, of the different sears. Figs. 4 and 5 are front end or sectional elevations, seen to the rearward, on the plane indicated by the line X X, Fig. 1, the small lever not being represented in section and the parts being differently positioned. Fig. 6 is a perspective view of the peculiarly-constructed trigger and the parts intimately appurtenant thereto, shown in separated relations therefrom.

Similar characters of referenceindicate corresponding parts in all of the views.

In the drawings, A represents the frame or supporting-plate of the lock mechanism, pivoted to which at a is the trigger B, of which the body portion is constituted by the block Z), having the depending finger-piece 0.

(Z represents the trigger-spring, the same exerting a downward force on the trigger.

The trigger block or body has through the upper portion thereof a transverse aperture or way f extending from side to side and which is upwardly open at the top, as shown at f in Fig. 6.

F represents one of the hammers, and E E represent the sears oppositely located,as usual. D represents a bar fitted for sliding move ment in and through the aforementioned aperture or Way f at the upper portion of the trigger-block for engagement, according tow the thickness thereof, penetrates the block in its widththat is, from top to bottom.

J represents a lever having the intermediate portion thereof located and fitted within the recess h and therein pivotally connected by the pivot-pin d and capable of a swinging movement transversely of the length of the gun-lock. This lever has at its upper extremity and above the top of the triggerblock a rearwardly-extending right-angular member slotted or recessed, as shown at it, to receive the engagement therein of the upwardly-projecting stud of the sear-engaging bar, so that when the lever is swung in either direction the sear-engaging bar will be correspondingly transversely slid. The upper extremity of the said lever J also has the integrally-formed right-angular and forwardlyextending member we made V-shaped with its apex downward and near the top of the trigger-body.

The trigger-body has a spring-detent or snap-catch n in its middle upper portion, the same being in the present instance made by a conical top-ended stud fitted in a socket n in the trigger-body and seated against a spiral spring 0 in said socket.

The lever J has at one side of its portion which depends below the bottom edge of the trigger-body and below the under side of the lock -frame a shoulder or abutment t and which in one of the swung positions of the lever is in position on the elevation of the trigger to come to an engagementwith the under side of the lock-frame and by the impingement thereagainst to produce a transverse swinging movement'of the lever.

The parts are formed, arranged, and adjusted so that there may be a sufficient movement by the finger-draft on the trigger to swing the sear for the hammer disengagement before the lever-shoulder t, by its impinge-- ment against the frame, insures the transverse swinging of the lever.

Explaining the operations and effect thereof it will be assumed that the lever has by the finger been swung to the position represented in Figs. 1 and 5, with the result of bringing the sear-engaging bar by its one extremity under and to engage the right-hand sear. Now the trigger pull elevating the bar will swing the right-hand sear for its hammer disengagement, firing the right-hand barrel, the space for a proper degree of lostmotion between the shoulder t and the under side of the frame insuring the actuation of the sear before the lever by the stated engagement is swung for the sear-bar-reversing action, which action is accomplished during the final portion of the period of trigger swing. The extent to which the trigger will by the engagement of the shoulder t with the frame be positively swung is such as to carry the inverted apex of the part m crosswise past the point of the conical spring-reacting detent m, the action of which latter is to swing the lever somewhat more than may be accomplished by the frame and shoulder engagement and to retain the lever and the searengaging bar in the shifted-positions represented in Figs. 3 and 4 until such time as the lever is purposely reshifted to the first-mentioned position by the finger. After a firing of the right-hand barrel the lever will remain in the position represented in Figs. 3 and 4, so that the left-hand barrel may be repeatedly fired by successive trigger pulls unless the lever is purposely shifted. Therefore a gun provided with this lock mechanism may be cooked and have the trigger mechanism set so that first the right-hand barrel will be fired and the trigger mechanism then automatically assume engagements for the firing of the left-hand barrel.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In a lock for a double-hammer gun, the combination with the lock-frame and oppositely-located sears, of a trigger having abar movable transversely therethrough and projecting beyond the sides of the trigger, for engagement with one or the other of the sears, a lever, pivoted to the trigger and having a swinging movement transversely thereof, provided with a shoulder adapted, on its movement bodily with the swinging of the trigger, to engage the frame and in consequence derive its swinging movement, and having an engagement with, and controlling, the transverse movements of said sear-engaging bar.

2. In a lock for a double-hammer gun, the combination with the lock-frame and oppositely-located sears, of a trigger having a bar movable transversely therethrough and projecting beyond the sides of the trigger, for

' engagement with one or theother of the sears, a lever, pivoted to the trigger and having a swinging movement transversely thereof, provided with a shoulder adapted, on its movement bodily with the swinging of the trigger, to engage the frame and in consequence derive its swinging movement, and having an engagement with, and controlling, the transverse movements of said sear-engaging bar, and said lever having a V-shaped member projecting adjacent a surface of the trigger, and the trigger having a tapered spring-projected and yielding detent relatively to which said V member, in the traverses of the lever, has snap catch engagements.

3. In a lock for a double-hammer gun, the combination with the lock-frame and oppositely located sears, of a trigger having through the upper portion of the block or body thereof, the transverse aperture or way, which is also upwardly opening, and having adjacent said way a recess extending from top to bottom of the trigger-body, the sear-engaging bar movably fitted in said transverse way, and endwise extended beyond the trigger sides, a lever having its intermediate portion located and pivotally connected in said trigger-recess, having at its upper extremity an angular portion overlying and in engagement with the sear-engaging bar, and having at its depending portion a shoulder in position to engage, in the upward movement of said lever bodily with the trigger,the frame, and deriving, consequently, the transverse swinging movement relatively to the trigger, for the purpose set forth.

4. In a lock for a double-hammer gun, the combination with the lock-frame and oppositely located sears, of a trigger having through the upper portion of the block or body thereof a transverse aperture or way, which is also upwardly opening, and having adjacent said way a recess extending from top to bottom of the trigger-body, a sear-engaging bar movably fitted in said transverse way, and having the extremities thereof extended sidewise beyond the trigger, and provided intermediately with a stud upwardly extending through the opening at the top of said way, a lever having its intermediate portion located, and pivotally connected in, said trigger-recess, having at its upper extremity an angular recessed portion in which the stud of the sear-engaging bar engages, and having at its depending portion a shoulder in position to engage the frame, substantially as and for the purpose set forth.

5. In a lock for a double-hammer gun, the combination with the lock-frame, and oppositely located sears, of a trigger, having, through the upper portion of the block or body thereof, a transverse aperture or way, which is also upwardly opening to the top of the trigger-body, and said trigger having, adjacent said way a recess extending from top to bottom of its body, a sear-engaging bar movably fitted in said'way and extended beyond the sides of the trigger, a lever having its intermediate portion pivotally connected in said recess, having at its upper extremity forwardly and rearwardly extending angular members,

one of which overlies, and is in engagement with, the sear-engaging bar, and the other thereof being of V form, and said lever having at its depending portion the shoulder, which, according to the positioning of the lever, will engage, or move freely relatively to, the frame, and the spring-projected detent, provided at the upper portion of the trigger-body, and with which the V-shaped member of the said lever has a clicking by-pass engagement.

Sign ed by me at Springfield, Massachusetts, in presence of two subscribing witnesses.

ALBERT D. HOULDCROFT.

Witnesses:

WM. S. BELLoWs, G. R. DRISCOLL. 

